SOUTHERN PACIFIC RAILROAD BRASS SWITCH KEY

For sale is an old brass switch key and two brass buttons all marked Southern Pacific. The key is about 2" long, marked "ADLAKE" on one side and "S.P.CO. CS-4S" on the other side. One button is about 7/8" in diameter and marked "PETTIBONE BROS. MFG. CO. CIN." on the underside. The other button measures 1/2" in diameter and is marked "SCOVILL MFG. CO. All are in good vintage condition.